Which to use
“Longueuil” is a name and “longueur” is a noun - they look or sound alike but fill different roles in a sentence.
- #17,755
- “Longueuil” frequency rank
- #1,874
- “longueur” frequency rank
- 19629
- confusion score
Side-by-Side Comparison
| Feature | Longueuil | longueur |
|---|---|---|
| Definition | Ville canadienne du Québec située dans la région de la Montérégie. | Étendue d’un objet considéré, dans une seule dimension, d’une de ses extrémités à l’autre. |
Where the eye mixes Longueuil and longueur
Muted = shared; highlighted = the visual trap. They share 7 letters in sequence.
Why the eye confuses Longueuil with longueur
These two trip readers on the page rather than in the ear: Longueuil is \lɔ̃.ɡœj\ while longueur is \lɔ̃.ɡœʁ\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 19629, derived from the frequency rank of both members and their visual similarity.
Longueuil is recorded at frequency rank #17,755, classified as aname, pronounced \lɔ̃.ɡœj\. longueur is at rank #1,874, tagged as anoun, pronounced \lɔ̃.ɡœʁ\.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 19629, this pair ranks #372,329 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of Longueuil vs longueur
Shared letters: eglnou. Private to "Longueuil": i. Private to "longueur": r.
"Longueuil" · 9 letters · shape CVCCVVVVC · "longueur" · 8 letters · shape CVCCVVVC
Known mistypes of this pair
Frequently Asked Questions
Can "Longueuil" and "longueur" be used interchangeably?
In ordinary French text, does "Longueuil" or "longueur" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "Longueuil" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "longueur" - compare definitions side by side with the headword page. Word entry
- This pair ranks #372,329 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "Longueuil" and "longueur" also get mixed up with nearby pairs, the highest-scored neighbour is "longueur vs loueur". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #372,329 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.